#include<fstream>
using namespace std;

ifstream in("chatnoir.in");
ofstream out("chatnoir.out");

int t,n,m,x,y,dmin;

int main() {
    int i;

    in >> t;

    for(i=1;i<=t;++i) {
        in >> n >> m >> x >> y;

        dmin=x-1;
        if(n-x<dmin)
            dmin=n-x;
        if(y-1<dmin)
            dmin=y-1;
        if(m-y<dmin)
            dmin=m-y;

        if(2*n + 2*(m-1) > 2*(n-1) + 2*(m-2) + dmin)
            out << "DA\n";
        else
            out << "NU\n";
    }

    return 0;
}